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Use 64-bit POSIX off_t in user space instead of the Linux kernel type loff_t. This is enforced at configure time via AC_SYS_LARGEFILE and AC_CHECK_SIZEOF([off_t]). loff_t remains in shared headers where they mirror Linux VFS interfaces, and on FreeBSD we typedef loff_t to off_t in those headers since libc does not provide it. Reviewed-by: Rob Norris <robn@despairlabs.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Moch <mail@alexmoch.com> Closes #18020
22 lines
671 B
Plaintext
22 lines
671 B
Plaintext
dnl #
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dnl # ZFS_AC_CONFIG_USER_LARGEFILE
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dnl #
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dnl # Ensure off_t is 64-bit for large file support in userspace.
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dnl # This is required for OpenZFS to handle files larger than 2GB.
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dnl #
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AC_DEFUN([ZFS_AC_CONFIG_USER_LARGEFILE], [
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AC_SYS_LARGEFILE
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AC_CHECK_SIZEOF([off_t])
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AC_MSG_CHECKING([for 64-bit off_t])
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AS_IF([test "$ac_cv_sizeof_off_t" -ne 8], [
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AC_MSG_RESULT([no, $ac_cv_sizeof_off_t bytes])
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AC_MSG_FAILURE([
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*** OpenZFS userspace requires 64-bit off_t support for large files.
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*** Please ensure your system supports large file operations.
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*** Current off_t size: $ac_cv_sizeof_off_t bytes])
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], [
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AC_MSG_RESULT([yes, $ac_cv_sizeof_off_t bytes])
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])
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])
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